送交者: WM 于 May 15, 2002 07:51:23:
回答: 晓翔请看，给怀仁 由 小沙 于 May 15, 2002 00:07:34:
Xiaosha,
This is a very good article. Am I allowed to make some comments about blood type you mentioned? The blood is classified into different types based on different antigens carried by red blood cells not by different cells. The period is due to endometrium sloughing caused by hormonal changes. I did not know human being is the only sp. which has period. Female animals also have uterines and periodical hormonal changes, why do they not have menstruation?
My comments are purely related to scientific phenomena and my curiosity. I did not mean to criticize your article. Ignore what I just typed if you don't like my comments. Once again, I read almost all your articles and poems and like them very much. I envy you because you know so much about philosophy, religion and science.
Take care.